解决【This Python interpreter is in a conda environment, but the environment has not been activated.】

Warning:
This Python interpreter is in a conda environment, but the environment has
not been activated. Libraries may fail to load. To activate this environment
please see https://conda.io/activation

看了很多解决方案，这个最简单了。不过是一次性的。
输入activate base，再输入python就好啦。